crown block〔名词〕冠轮,天车详细»
crown block〔名词〕天车,拱顶石详细»
crown block〔名词〕顶滑车,拱冠石详细»
crown block〔名词〕起重定滑轮,天车详细»
crown block〔名词〕拱顶石,天车,拱顶石详细»
crown block〔名词〕天车详细»
crown block起重定滑轮,天车详细»
拱顶石arcade key;arch key stone;capstone;choke aggregate;crown block;crown stone;key block;lech;soffit cusp详细»
拱顶石arch key;key block;soffit cusp详细»